Hi, I have FD-ISR (the original) on my main computer, and I want to install it on a second computer. I have the set up file stored in "My Downloads". I transfered the .exe file to the same folder in the other computer and attempted to install FD-ISR. I got to the first window in the installation, and I got a pop up window that said "First Defense-ISR requires that the Windows system volume be the boot volume". I clicked OK and the installation aborted. Excuse my lack of knowledge, but what does that mean exactly? I didn't get that when I installed on my main computer. The computer in question is running XP sp3, and the main partition is the C drive, with a small D drive that stores the OS re-installation. Thanks in advance for any help.